HP OpenVMS Systems

Why is the disk volume label important?

Is there any reason why MOUNT /SYSTEM /OVERRIDE=IDEN is not allowed?
I have written a workaround to:
moun /over=id disk
vol = f$getdvi("volnam")
dismount disk
mount /system disk 'vol'
It is more complex in a cluster, but it can still be done in DCL.

The Answer is :

The volume label is used as the basis for cluster-wide coordination,
and all shared volumes will effectively use the (unique) label to
coordinate access, to prevent duplicate volumes, and to ensure that
the expected volume is the volume that is actually mounted.
Could this be changed? Certainly. That said, the OpenVMS Wizard
would prefer to explicitly reference the target volume label lest
the wrong volume be mounted. (Mounting the wrong volume can result
in data being overwritten due to an unintentional shadowset copy,
or any number of other adverse or unintended behaviors.)
A local customization to SYS$EXAMPLES:MSCPMOUNT.COM is one of the
more common approaches for mounting and maintaining access to disk
volumes.